<div dir="ltr">Hi All,<br><br>I am using iommu to receive packets both from hypervisor and from VM. KVM is used for the virtualization. However, after I deliver the kernel options (iommu and pci realloc), I can not receive packets in hypervisor, but VF works fine in VM. When I tried to receive packets in hypervisor, dmesg shows the following:<br>
<br>ixgbe 0000:03:00.1: complete <br>ixgbe 0000:03:00.1: PCI INT A disabled <br>igb_uio 0000:03:00.1: PCI INT A -> GSI 38 (level, low) -> IRQ 38<br>igb_uio 0000:03:00.1: setting latency timer to 64 <br>
igb_uio 0000:03:00.1: irq 87 for MSI/MSI-X <br>uio device registered with irq 57 <br>DRHD: handling fault status reg 2 <br>DMAR:[DMA Read] Request device [03:00.1] fault addr <b>b9d0f000</b> <br>
DMAR:[fault reason 02] Present bit in context entry is clear<br><br>03:00.1 Ethernet controller: Intel Corporation 82599EB 10 Gigabit Dual Port Backplane Connection (rev 01)<br> Subsystem: Intel Corporation Ethernet X520 10GbE Dual Port KX4-KR Mezz<br>
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+<br> Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-<br>
Latency: 0, Cache Line Size: 64 bytes <br> Interrupt: pin A routed to IRQ 38 <br> Region 0: Memory at <b>d9400000</b> (64-bit, prefetchable) [size=4M]<br> Region 2: I/O ports at ece0 [size=32] <br>
Region 4: Memory at d9bfc000 (64-bit, prefetchable) [size=16K]<br> Expansion ROM at <ignored> [disabled] <br> Capabilities: <access denied> <br>
Kernel driver in use: igb_uio <br>
Kernel modules: ixgbe <br><br><div>We can see those addresses are not matched. So the kernel got fault. I am wondering why this happens?</div><div><br></div><div>One suspicion for this is BIOS. I am currently using BIOS version 3.0, but the latest is 6.3.0. Does this affect the matter? </div>
<div><br></div><div>Any help appreciated!</div><div><br></div><div>Jinho <br><div> <br></div></div></div>